The General Purpose 2D Electromagnetic Tool, GP2DET, at Voith Siemens Hydro Power Generation GmbH is a tool developed for simulation and calculation of electrical parameters in large hydro power machines. In this tool, the ...

The goal of the master thesis is to design, dimension and construct a power boost system for the drive trains in electric vehicles, utilizing supercapacitor technology. In order to build the system a supercapacitor bank ...

Near an electric arc some polymers can change the properties of an arcing medium in a beneficial manner. Such polymers, known as ablation material, decompose and evaporate when exposed to heat from an electric arc. The ...

This paper conducts a case study on hydropower scheduling considering sales of capacity reserves and impacts of detailed mod-elling. In latter years a growing demand for reserve capacity has been needed to ensure stable ...

In several electrical insulation components, such as cable connectors, joints and penetrators, various solid insulating materials are usually brought in contact, forming interfaces. The dielectric strength of these ...

This Master thesis studies losses in superconductors. Losses arise when the superconductor carries alternating current or is placed in an alternating magnetic field. As most power applications involve at least one of the ...

Ever since the phenomenon of superconduction was discovered, and especially after the discovery of high-temperature superconductors (HTS) in the mid-80s, there has been high expectations to what could be achieved by this ...

The MgB2 superconductor is an attractive choice for many high-current DC applications, particularly for its low cost compared to e.g. YBCO, and the higher operating temperature than the low-temperature superconductors. To ...

In this thesis it is first presented how robust control can be used to give AC motor drive systems competitive dynamic performance under parameter variations. These variations are common to all AC machines, and are a result ...

This paper presents a control scheme that utilizes energy storage of the Modular Multilevel Converter (MMC) for Power Oscillation Damping (POD) service. Such a service is used to enhance grid stability by providing damping ...

Superconductive materials can conduct DC currents without energy losses when cooled down below their critical temperature. However, under AC conditions, energy losses appear in the superconductor. In 2001 the new and ...

Modern electrical rail vehicles employ four-quadrant voltage source converters, which allow independent control of real and reactive power. This thesis focuses the control of reactive power at the vehicle regarding load ...

This thesis is centered around the possibilities of utilizing the active filter capability of a Voltage Source Inverter (VSI) to mitigate harmonic distortion in a marine power system.
Hotel loads in marine vessels ...

The tendency of connecting the Power Electronic loads and distributed power plants through Power Electronic converters is increasing day by day. These Power Electronic converters and loads are the sources of harmonics and ...

When Europe is transitioning from fossil fuels to renewables, hydropower plants will have an important role in the integration of large quantities of fluctuating sources in the power system, such as wind and solar. With ...

Summary Literatures on battery technologies and diagnosis of its parameters were studied. The innovative battery technologies from basic knowledge to world standard testing procedures were analysed and discussed in the ...

Multilevel converters can reach medium-voltage operation increasing the efficiency
of high-power applications. Among the available multilevel converter topologies, the
invention of Modular Multilevel Converter (MMC) has ...

The recent surge in renewable energy in the distribution grid could transform the generation side to be more variable, which potentially reduces power quality. This technical local challenge could be compensated by introducing ...

Electricity grid infrastructures provides valuable flexibility in power systems with high shares of variable supply due to its ability to distribute low-cost supply to load centers (spatial), in addition to interlinking a ...

Given the pursuit of long-term decarbonisation targets, future power systems face the task of integrating the renewable power and providing flexible backup production capacity. Due to its general ability to be dispatched, ...